1. Introduction to Web Frontend Development with JavaScript

2. Internet Network of Computer Networks

3. World Wide Web The part of the Internet that communicates http and (often) html.

4. HTTP HyperText Transfer Protocol Client/Server Network Protocol Requests are sent with Verbs to Resources Get, Post, Put, Delete, Patch, Trace, Options Responses are returned by the server with a status code 200 OK, 404 Not Found, 301 Permanent Redirect

5. Web Development is hard. You must know at least 3 (often 4) programming languages: JavaScript the state and behavior of then frontend CSS how things look HTML structure of the UI/Document Server Programming Stateful storage and interaction with other servers

6. But you can make great things!

7. The Planetarium Beautiful Web Introduction to the solar system BananBread Web FPS shoorter CSS Tricks Web Animation (using data from 3d body tracking)

8. Not to mention all this stuff:

9. Let’s start…

10. Firefox Scratchpad Shift+F4

11. alert() Modal window

12. prompt() Rarely used. Modal window.

13. console.log() Shows in console

14. Let’s take a look at some syntax Syntax Reference

15. var var aNumber = 1, aString = "a string", anArray = [1, 2, "string"], anObject = {a: 1; b: "string", "c": 4};

16. If Statement if ( /* something truthy */ ) { //code to execute } else { // code to execute }

17. Switch Statement switch (variable) { case value1: //statements break; case value2: //more statements default: //more statements break; }

18. for loop for (var i = 0; i < 5; i++) { //statements }

19. for … in for (key in object) { //statements }

20. while loop while (condition) { statement; }

21. do … while do { statement; } while (condition);

22. Weak Dynamic Typing

23. Truthy When a value will be “true enough” for an if (or while) condition.

24. Truthy vs true var obj = {}; console.log("an empty object is not equal to true: " + (obj == true)); if (obj) { console.log("but it’s truthy"); }

25. Two Concepts 1.A value that is not equal to true may still be truthy. 2.A value that is equal to true is truthy.

26. Truthiness true 1 [1, 2] {a: 1} "something"

27. Falsiness false 0 "" NaN undefined null

28. Two comparison Operators == (equal) vs. === (strictly equal)

29. == does type coercion It checks whether the values can be coerced into the same type and then if their values become equal.

30. === checks type and value ALWAYS use ===

31. == vs === 1 == 1 true 1 == "1" true 1 == true true 0 == false true 1 === 1 true 1 === "1" false 1 === true false 0 === false false